JP6845925B2 - Methods and equipment for handover - Google Patents

Description

The present invention relates to the field of communication, and more specifically to methods and devices for handover.

In a Long Term Evolution (Long Term Evolution, simply referred to as "LTE") system, when a terminal device moves in a connected state, the terminal device measures a signal according to the configuration of the base station, and according to the conditions required by the base station. Make a measurement report. When the terminal device needs to be handed over, the original base station transmits a handover request message including bearer information or the like that needs to be handed over to the target base station of the terminal device to the target base station. When the target base station receives the handover request message, the target base station confirms the handover request, and the terminal equipment uses the random access resource or the like that needs to be used in the cell to which the target base station belongs to the terminal to which the original base station belongs. It is transmitted to the terminal device via the serving cell. After receiving the corresponding message, the terminal device establishes synchronization with the cell to which the target base station belongs and completes the handover.

Therefore, the base station needs to be configured so that the terminal device performs the measurement and the terminal device performs the corresponding measurement report after the measurement, and the signaling overhead is large.

The present invention provides methods and devices for handover that can save signaling overhead in communication systems and improve utilization of communication resources.

According to the first aspect, a method for handover is provided, in which the network device receives a measurement signal transmitted by the terminal device, and the network device is based on the measurement signal. Includes a step of determining whether the device needs to perform a handover.

Therefore, the network device according to the embodiment of the present invention determines whether or not the terminal device needs to perform a handover based on the measurement signal transmitted by the terminal device. As a result, it is not necessary for the network device to make the measurement configuration for the terminal device and for the terminal device to report the measurement result. Therefore, signaling overhead and transmission resources can be saved, and the utilization rate of transmission resources can be improved.

In connection with the first aspect, in the first possible embodiment of the first aspect, the method further comprises the step of acquiring the measurement signal related information by the network device, the measurement signal related information. It is for instructing the information of the parameter corresponding to this measurement signal.
Here, the step of determining whether or not the network device needs to perform a handover based on this measurement signal is a step in which the network device is based on this measurement signal and this measurement signal related information. Includes the step of determining whether the device needs to perform a handover.

In relation to the first possible embodiment of the first aspect, in the second possible embodiment of the first aspect, the step of the network device to acquire the measurement signal related information is that the network device The step of receiving the measurement signal related information transmitted by the terminal device is included.

In relation to the first or second possible implementation of the first aspect, in the third possible implementation of the first aspect, the measurement signal related information includes transmission power information, which transmission power information. Is used by this network device to determine the transmit power of this measurement signal based on this transmit power information, where the step by which this network device obtains the measurement signal related information is that this network device has this transmission. Includes steps to acquire power information.

In connection with the third possible embodiment of the first aspect, in the fourth possible embodiment of the first aspect, the transmit power information includes the absolute value of the transmit power of this measurement signal, or This transmission power information includes an offset of the transmission power of this measurement signal with respect to the initial transmission power, where the initial transmission power is the power for transmitting the measurement signal configured by this network device for this terminal device. Yes, or this transmit power information includes the transmit power margin of this terminal device.

In relation to the third or fourth possible implementation of the first aspect, in the fifth possible implementation of the first aspect, the step by which the network device acquires this transmit power information is this network. The device includes a step of receiving the uplink information transmitted by the terminal device via the uplink control channel, and the uplink information includes the transmitted power information.

In relation to the fifth possible embodiment of the first aspect, in the sixth possible embodiment of the first aspect, the reserved information bit in this uplink information includes or contains this transmitted power information. This transmission power information is an index value of transmission power.

In relation to the third or fourth possible embodiment of the first aspect, in the seventh possible embodiment of the first aspect, the step by which the network device acquires this transmit power information is this network. The device includes a step of receiving the control element MAC CE of the media access control transmitted by the terminal device, and the MAC CE includes this transmission power information.

In connection with the third or fourth possible implementation of the first aspect, in the eighth possible implementation of the first aspect, the step by which the network device acquires this transmit power information is this network. The device includes a step of determining this transmission power information based on the measurement signal or the correspondence between the mode of the measurement signal and the transmission power.

In connection with the eighth possible embodiment of the first aspect, in the ninth possible embodiment of the first aspect, the network device corresponds to this measurement signal or the mode of this measurement signal with transmission power. The step of determining the transmission power information based on the relationship includes a step of the network device determining the transmission power information based on the correspondence between the measurement signal or the mode of the measurement signal and the transmission power level.

In connection with the ninth possible embodiment of the first aspect, in the tenth possible embodiment of the first aspect, the network equipment has the measurement signal or the mode and transmission power level of the measurement signal. based on the correspondence, the step of determining the transmission power information, the network device determines the transmission port of the measurement signal, the network device based on the correspondence relationship between the transmission power and the transmission port, the transmission power step determining information, or, the network device determines the time-frequency resources corresponding to the measurement signal, the network device based on the correspondence relationship between the time-frequency resource and transmit power, to determine the transmission power information step or to determine the code word this network device corresponding to the measuring signal on the basis the network device to the corresponding relation between the codeword and the transmission power, comprising the step of determining the transmission power information.

In relation to any one of the first to tenth possible realizations of the first aspect, in the eleventh possible realization of the first aspect, this network device is this. The step of determining whether or not the terminal device needs to perform a handover based on the measurement signal and the measurement signal related information is an uplink signal that the network device uses based on the measurement signal and the measurement signal related information. The steps to determine quality and whether this network device is based on this signal quality and whether or not this terminal device needs to perform a handover, or this network device is based on this signal quality and downlink channel performance. , Including a step of determining whether or not the terminal device needs to perform a handover.

In the twelfth possible realization of the first aspect, in relation to any one of the first to eleventh possible realizations of the first aspect or the first aspect. Before the network device receives the measurement signal transmitted by the terminal device, this method allows the network device to send the terminal device the initial transmission power, the index value of the transmission power, the measurement signal or the mode of the measurement signal and the transmission power. Alternatively, the step of transmitting at least one of the correspondence relationship with the transmission power level and the correspondence relationship between the transmission power information and the reservation information bit in the uplink information is further included.

In the thirteenth possible realization of the first aspect, in relation to any one of the first to twelfth possible realizations of the first aspect or the first aspect. The method further includes the step of the network device transmitting control information to the terminal device, which control information is whether or not the terminal device transmits a measurement signal and / or measurement signal related information to the network device. It is for instructing.

According to the second aspect, a method for handover is provided, which includes a step of the terminal device generating a measurement signal and a step of the terminal device transmitting the measurement signal to the network device.

Therefore, in the method for handover according to the embodiment of the present invention, the terminal device transmits a measurement signal to the network device, and the network device performs the handover based on the measurement signal transmitted by the terminal device. Decide if you need it. As a result, it is not necessary for the network device to make the measurement configuration for the terminal device and for the terminal device to report the measurement result. Therefore, signaling overhead and transmission resources can be saved, and the utilization rate of transmission resources can be improved.

In connection with the second aspect, in the first possible embodiment of the second aspect, the method further comprises the step of the terminal device transmitting measurement signal related information to the network device, the measurement signal. The related information is for acquiring the information of the parameter corresponding to this measurement signal.

In relation to the first possible implementation of the second aspect, in the second possible implementation of the second aspect, the measurement signal related information includes transmission power information, which transmission power information is this. Network equipment is used to determine the transmit power of this measurement signal based on this transmit power information.

In connection with the second possible implementation of the second aspect, in the third possible implementation of the second aspect, the transmit power information includes the absolute value of the transmit power of this measurement signal, or This transmission power information includes an offset of the transmission power of this measurement signal with respect to the initial transmission power, where the initial transmission power is the power for transmitting the measurement signal configured by this network device for this terminal device. Yes, or this transmit power information includes the transmit power margin of this terminal device.

In connection with the second or third possible embodiment of the second aspect, in the fourth possible embodiment of the second aspect, the terminal device transmits measurement signal related information to the network device. Includes a step in which the terminal device transmits uplink information over the uplink control channel, which includes this transmit power information.

In relation to the fourth possible implementation of the second aspect, in the fifth possible implementation of the second aspect, the reserved information bit in this uplink information includes or contains this transmitted power information. This transmission power information is an index value of transmission power.

In connection with the second or third possible embodiment of the second aspect, in the sixth possible embodiment of the second aspect, the terminal device transmits measurement signal related information to the network device. Includes a step in which the terminal device transmits a control element MAC CE for media access control to the network device, which contains this transmitted power information.

In the seventh possible realization of the second aspect, in relation to any one of the first to sixth possible realizations of the second aspect or the second aspect. In this method, the terminal device has the initial transmission power transmitted by the network device, the index value of the transmission power, the correspondence between the measurement signal or the mode of the measurement signal and the transmission power or the transmission power level, and the transmission power information. It further includes a step of receiving at least one of the correspondences with the reserved information bits in the uplink information.

In the eighth possible realization of the second aspect, in relation to any one of the first to sixth possible realizations of the second aspect or the second aspect. The method further comprises the step of the terminal device receiving the control information transmitted by the network device, which causes the terminal device to transmit the measurement signal and / or the measurement signal related information to the network device. It is for instructing whether or not
Here, the step in which this terminal device transmits this measurement signal to this network device is that if this control information indicates that this terminal device transmits this measurement signal to this network device, this terminal device will transmit this measurement signal to this network device. Includes the step of transmitting this measurement signal to the device.

According to the third aspect, a network device for carrying out the method in any possible implementation of the first aspect or the first aspect described above is provided. Specifically, the network device comprises a functional module for performing the method in any possible realization of the first aspect or the first aspect described above.

According to the fourth aspect, a terminal device for carrying out the method in any possible realization of the second aspect or the second aspect described above is provided. Specifically, the terminal device comprises a functional module for performing the method in any possible realization of the second aspect or the second aspect described above.

According to a fifth aspect, a network device is provided, the device comprises a processor, a memory and a transmitter / receiver, the processor, the memory and the transmitter / receiver are connected to each other via a bus system, and the memory is an instruction. Used to store information, this processor controls this transmitter / receiver to receive or send information by executing instructions stored in this memory, which causes this network equipment to receive or transmit information. The method in any possible realization of the first aspect or the first aspect described above is carried out.

According to a sixth aspect, a terminal device is provided, the device comprises a processor, a memory and a transmitter / receiver, the processor, the memory and the transmitter / receiver are connected to each other via a bus system, and the memory is an instruction. Used to store information, this processor controls this transmitter / receiver to receive or send information by executing instructions stored in this memory, which causes this terminal device to receive or transmit information. The method in any possible realization of the second aspect or the second aspect described above is carried out.

According to a seventh aspect, a computer-readable medium for storing a computer program is provided, the computer program being used to perform a method in any possible embodiment of the first aspect or the first aspect. Instructions are included.

According to an eighth aspect, a computer-readable medium for storing a computer program is provided, the computer program being used to perform a method in any possible embodiment of the second aspect or the second aspect. Instructions are included.

Hereinafter, in order to more clearly explain the technical means according to the examples of the present invention, the drawings that need to be used in the examples of the present invention will be briefly introduced. It should be noted that the drawings described below are merely examples of a part of the present invention, and those skilled in the art can obtain other drawings from these drawings on the premise that creative labor is not applied.
It is a schematic diagram of the communication system applied to the communication method which concerns on embodiment of this invention. It is a schematic flowchart which shows the method for handover which concerns on embodiment of this invention. It is a schematic flowchart of the method for handover according to another embodiment of this invention. It is a schematic flowchart of the method for handover according to still another embodiment of this invention. It is a schematic flowchart of the method for handover according to still another embodiment of this invention. It is a schematic block diagram of the network device which concerns on embodiment of this invention. It is a schematic block diagram of the terminal apparatus which concerns on embodiment of this invention. It is a schematic block diagram of the network apparatus which concerns on another Example of this invention. It is a schematic block diagram of the terminal apparatus which concerns on another Example of this invention.

In the following, the technical means according to the embodiment of the present invention will be described more clearly and completely with reference to the drawings according to the embodiment of the present invention, and the example described is a part of the embodiment of the present invention. It is clear that it is just, not all. All other examples obtained based on the embodiments of the present invention on the premise that those skilled in the art do not grant creative labor belong to the scope of protection of the present invention.

The technical means of the embodiments of the present invention are Global System of Mobile communication (simply referred to as "GSM") systems, Code Division Multiple Access (simply referred to as "CDMA") systems, and broadband codes. Split Multiple Access (Wideband Code Division Multiple Access, simply referred to as "WCDMA") system, General Packet Radio Service, simply referred to as "GPRS", Long Term Evolution (Long Term Ev, simply referred to as "GPRS") System, LTE Frequency Division Duplex (simply referred to as "FDD") system, LTE Time Division Duplex (simply referred to as "TDD"), Universal Mobile System , Simply referred to as "UMTS") or Global Interconnect Microwave Access (Worldride Interoperability for Microwave Access, simply referred to as "WiMAX"), 5G systems, or new radio (New Radio, simply referred to as "NR") systems. It should be understood that it applies to various communication systems such as.

In the embodiments of the present invention, the nouns "network" and "system" are often used interchangeably, but those skilled in the art will understand their meaning. The terminal device according to the embodiment of the present invention includes various handheld devices having a wireless communication function, an in-vehicle device, a wearable device, a computing device, another processing device connected to a wireless modem, and various types of user devices (User). It may include an Appliance (simply referred to as "UE"), a mobile station (Mobile Station, simply referred to as "MS"), a terminal (Terminal), a terminal device (Terminal Device), and the like. For convenience of explanation, in the examples of the present invention, the devices mentioned above are collectively referred to as terminal devices.

In the embodiment of the present invention, the network device may be a device for communicating with the terminal device, and the network device is referred to as an evolutionary base station (Evolutional Node B, simply "eNB" or "eNodeB" in the LTE system. The network device may be a relay station, an access point, an in-vehicle device, a wearable device, a network device in a future 5G network, a network device in a future evolution PLMN network, or the like.

The handover according to the embodiment of the present invention means that the UE moves between different cells in the connected state, so that the UE completes the context change and update of the UE via some signalings. Should be understood. Downstream refers to the network device transmitting information to the terminal device. Upstream refers to the terminal device transmitting information to the network device.

FIG. 1 is a schematic structural diagram of a communication system applied to the communication method according to the embodiment of the present invention. The communication system of FIG. 1 includes a source base station 110a that controls a serving cell 101a, a target base station 110b that controls a target cell 101b, and a UE 120. However, the present invention does not limit the number of original base stations 110a, target base stations 110b and UE 120 in the communication system.

The serving cell is the current serving cell of the UE 120. In the connected state, a communication link is established between the original base station 110a and the UE 120, and a call and / or data transmission is performed using this communication link.

When the UE 120 needs to hand over from the serving cell to the target cell and the target base station 110b determines that the UE 120 has agreed to the handover, the original base station 110a transmits a handover command to the UE 120. After receiving this handover instruction, the UE 120 activates the handover from the serving cell 101a to the target cell 101b.

The serving cell 101a and the target cell 101b shown in FIG. 1 belong to different base stations, but they are merely examples and do not constitute a limitation for the application scenario of the present invention. For example, the serving cell 101a and the target cell 101b may belong to the same base station.

Hereinafter, a method for handover according to an embodiment of the present invention will be described in relation to the application scenario shown in FIG. FIG. 2 shows a method for handover according to an embodiment of the present invention, and as shown in FIG. 2, the method 200 includes the following steps.

S210: The network device receives the measurement signal transmitted by the terminal device.

S220: The network device determines whether or not the terminal device needs to perform a handover based on the measurement signal.

Therefore, the method for handover according to the embodiment of the present invention determines whether or not the network device needs to perform the handover based on the measurement signal transmitted by the terminal device. As a result, it is not necessary for the network device to make the measurement configuration for the terminal device and for the terminal device to report the measurement result. Therefore, signaling overhead and transmission resources can be saved, and the utilization rate of transmission resources can be improved.

It should be understood that the terminal device may be the UE 120 shown in FIG. 1 and the network device may be the original base station 110a shown in FIG.

Further, the network device according to the method 200 may be a network device corresponding to the serving cell in which the terminal device is currently located, and the network device according to the method 200 also corresponds to an adjacent cell of the terminal device. It may be a network device that does, and it should be understood that the present invention does not limit this.

Further, when the network device according to the method 200 is a network device corresponding to the adjacent cell of the terminal device, the network device performs uplink time synchronization based on the received measurement signal, and the adjacent cell of the terminal device. Can determine the signal quality of.

In the embodiment of the present invention, the network device determines whether or not the terminal device needs to perform a handover based on the measurement signal. The measurement signal is understood to be a signal for measuring the link quality of the terminal device by the network device.

In the embodiment of the present invention, the measurement signal may be a signal defined as a signal professionally used for determining whether or not the terminal device performs the handover by the network device. The measurement signal may also not itself be a signal professionally defined as a signal used by a network device to determine whether a terminal device needs to perform a handover, eg, measurement. The signal is an upstream sounding reference signal (Sounding Reference Signal, simply referred to as "SRS").

Optionally, as another embodiment, the measurement signal is a codeword, and the present invention is not limited to the specific form of the codeword.

In the above embodiment, the network device selectively notifies the terminal device to transmit the measurement signal in a periodic or aperiodic manner via higher layer signaling or physical layer signaling. Further, the terminal device periodically transmits a measurement signal to the network device according to the configuration of the network device. Alternatively, the terminal device transmits a measurement signal to the network device aperiodically according to the configuration of the network device.

In an embodiment of the invention, selectively, as shown in FIG. 3, the method 200 further comprises the following steps:

S230: The network device acquires the measurement signal-related information, and the measurement signal-related information is for instructing the information of the parameter corresponding to the measurement signal.

Correspondingly, when the network device determines whether or not the terminal device needs to perform a handover, the network device determines whether or not the terminal device needs to perform a handover based on the measurement signal and the measurement signal related information.

Optionally, as an example, the network device receives this measurement signal related information transmitted by the terminal device.

Further, the network device transmits control information to the terminal device, and the control information is for instructing whether or not the terminal device transmits a measurement signal and / or measurement signal related information to the network device. .. When the control information indicates that the terminal device transmits the measurement signal and / or the measurement signal-related information to the network device, the terminal device transmits the measurement signal and / or the measurement signal-related information to the network device. Optionally, the network device transmits control information to the terminal device via terminal device dedicated control signaling.

In the above embodiment, selectively, the measurement signal related information includes transmission power information, and this transmission power information is used by this network device to determine the transmission power of this measurement signal based on this transmission power information. Will be done.

Specifically, the transmission power information includes the absolute value of the transmission power of the measurement signal. Alternatively, the transmission power information includes an offset of the transmission power of the measurement signal with respect to the initial transmission power, where the initial transmission power is the power for transmitting the measurement signal configured by this network device for the terminal device. .. Alternatively, the transmission power information includes the transmission power margin of the terminal device.

Alternatively, the transmission power information is understood to indicate the absolute value of the transmission power of the measurement signal. For example, the transmission power information indicates that the transmission power of the measurement signal is 20 dBm. Alternatively, the transmission power information indicates an offset of the transmission power of the measurement signal with respect to the initial transmission power. For example, when the initial transmission power of the terminal device configured by the network device is 20 dBm and the offset indicated by the transmission power information is 5 dBm, the network device transmits the measurement signal by the terminal device based on the transmission power information. It is determined that the transmission power at that time is 15 dBm.

In the embodiment of the present invention, the terminal device selectively transmits uplink information to the network device via the uplink control channel, and the uplink information includes transmission power information.

The uplink control channel may be a physical uplink control channel (Physical Uplink Control Channel, simply referred to as "PUCCH") or a physical uplink shared channel (Physical Uplink Shared Channel, simply referred to as "PUSCH") in the LTE system. Understood.

Specifically, a reservation information bit can be introduced into the uplink information transmitted on the uplink control channel, and this reservation information bit indicates the absolute value of the transmission power and / or the transmission power margin. For example, the number of bits of the reserved information bit and the absolute value of the transmission power and / or the transmission power margin can be set in advance, and the network device sets the absolute value of the transmission power and / or the transmission power margin based on the number of bits of the reservation information bit. Can be decided.

Alternatively, the uplink information transmitted on the uplink control channel can directly include the absolute value of the transmission power and / or the transmission power margin, and the network device can directly include the absolute value of the transmission power and / or the transmission power by the uplink information. Margin can be determined.

Alternatively, the index value of the transmission power can be introduced into the uplink information transmitted on the uplink control channel. The correspondence relationship between the index value of the transmission power and the absolute value of the transmission power and / or the transmission power margin is configured in advance in the network device and the terminal device, and the network device sets the index value of the transmission power in the uplink information and this correspondence relationship. Based on this, the absolute value of the transmission power and / or the transmission power margin can be determined.

Optionally, as another example, the network device has a MAC control element (Control Element, simply referred to as "CE") in the media access control (Media Access Control, simply referred to as "MAC") layer transmitted by the terminal device. Receive. The MAC CE contains information such as the absolute value of the transmission power and / or the transmission power margin, and the index value of the transmission power.

In the embodiment of the present invention, the network device selectively determines the transmission power information based on the measurement signal or the correspondence between the mode of the measurement signal and the transmission power.

Specifically, the network device determines the transmission power information based on the correspondence between the measurement signal or the mode of the measurement signal and the transmission power level. Here, the transmission power level may specifically correspond to the absolute value of the transmission power, but the transmission power level may also specifically correspond to the offset of the transmission power with respect to the initial transmission power. ..

For example, when the measurement signal is SRS1, it corresponds to the transmission power level 1, and when the measurement signal is SRS2, it corresponds to the transmission power level 2. Optionally, the subframes that the terminal device occupies when transmitting SRS1 and SRS2 are not exactly the same.

Here, the transmission power level can be classified by spatial division. For example, the antenna port 1 corresponds to the power level 1 and the antenna port 2 corresponds to the power level 2. After determining the transmission port of the measurement signal, the network device can determine the absolute value of the transmission power and / or the offset of the transmission power with respect to the initial transmission power based on the correspondence between the antenna port and the power level.

Alternatively, the transmission power level can also be classified by time frequency resource. For example, the time frequency resource block 1 corresponds to the power level 1 and the time frequency resource block 2 corresponds to the power level 2. After the network device determines the time frequency resource block used to transmit the measurement signal by the terminal device, the network device determines the absolute value of the transmission power and / or the transmission power based on the correspondence between the time frequency resource block and the power level. The offset with respect to the initial transmission power of can be determined.

Alternatively, the transmission power level can be classified by a code word. For example, codeword 1 corresponds to power level 1 and codeword 2 corresponds to power level 2. After determining the codeword corresponding to the measurement channel, the network device can determine the absolute value of the transmission power and / or the offset of the transmission power with respect to the initial transmission power based on the correspondence between the codeword and the power level.

In all of the above embodiments, when the network device selectively determines whether or not the terminal device needs to perform a handover based on the measurement signal and the measurement signal related information, the network device shall perform the measurement signal and the measurement signal and the measurement signal. Determine the signal quality of the uplink signal based on the measurement signal related information. The network device then determines whether or not the terminal device needs to perform a handover based on the determined signal quality.

Specifically, the network device can determine the uplink path loss status based on the measurement signal and the transmission power information, and can determine the signal quality of the uplink signal of the current serving cell of the terminal device based on the uplink path loss status. The network device determines whether or not the terminal device needs to perform a handover based on the signal quality of the uplink signal of the current serving cell and the signal quality of the uplink signal of the adjacent cell.

For example, if the network device determines that the signal strength of the upstream signal of the current serving cell is lower than the first scheduled threshold, the terminal device determines that the handover needs to be performed. Alternatively, if the network device determines that the signal strength of the uplink signal of the current serving cell is lower than the second threshold value and the signal strength of the uplink signal of the adjacent cell is higher than the third threshold value, the network device is a terminal device. Determines that a handover needs to be performed, and the second threshold may be equal to the third threshold. Alternatively, if the network device determines that the difference between the signal strength of the uplink signal of the current serving cell and the signal strength of the uplink signal of the adjacent cell is greater than the fourth threshold value, the network device requires the terminal device to perform a handover. Determine that there is.

Further, after the network device determines the signal quality of the uplink signal of the current serving cell of the terminal device, the network device determines whether the terminal device needs to perform a handover based on the determined signal quality and the downlink channel performance. To determine.

For example, if the network device determines that the signal strength of the uplink signal of the current serving cell is lower than the first scheduled threshold and the bit error rate of the current downlink channel of the terminal device is higher than the second scheduled threshold, the network. The device determines that the terminal device needs to perform a handover. Alternatively, the network device has a signal strength of the uplink signal of the current serving cell lower than the second threshold value, a signal strength of the uplink signal of the adjacent cell higher than the third threshold value, and a bit of the current downlink channel of the terminal device. If the error rate is determined to be higher than the fourth scheduled threshold, the network device determines that the terminal device needs to perform a handover. Alternatively, in the network device, the difference between the signal strength of the uplink signal of the current serving cell and the signal strength of the uplink signal of the adjacent cell is larger than the fourth threshold value, and the bit error rate of the current downlink channel of the terminal device is the fifth. If it is determined that it is higher than the planned threshold value of, the network device determines that the terminal device needs to perform the handover. Alternatively, if the network device determines that the signal strength of the uplink signal of the current serving cell is higher than the sixth scheduled threshold, but the bit error rate of the current downlink channel of the terminal device is higher than the sixth scheduled threshold, the network. The device determines that the terminal device needs to perform a handover.

In all the above embodiments, selectively, before the network device receives the measurement signal transmitted by the terminal device, the network device sends the terminal device the initial transmission power, the index value of the transmission power, the measurement signal or the measurement. At least one of the correspondence between the signal mode and the transmission power level and the correspondence between the transmission power information and the reservation information bit in the uplink information is transmitted. Further, the network device transmits the above information to the terminal device via the signal dedicated to the terminal device.

In all of the above embodiments, if the network device selectively determines that the terminal device needs to perform a handover, the network device sends a handover request to the target network device, and the target network device sends the request. Confirm. The target base station transmits the resources required for handover to the terminal device, and then the terminal device is synchronized with the cell to which the target base station belongs .

As described above, the method for handover according to the embodiment of the present invention has been described in detail from the network device side in relation to FIGS. 2 and 3, and the following is a terminal in relation to FIGS. 4 and 5. The method for handover according to the embodiment of the present invention will be described in detail from the device side. It is understood that the interaction between the terminal device and the network device, related characteristics, functions, etc. explained on the network device side correspond to the explanation on the terminal device side, and duplicate explanations are appropriately omitted for the sake of brevity. It should be. As shown in FIG. 4, the method 300 includes the following steps.

S310: The terminal device generates a measurement signal.

S320: This terminal device transmits this measurement signal to the network device.

Therefore, in the method for handover according to the embodiment of the present invention, the terminal device transmits a measurement signal to the network device, and the network device performs the handover based on the measurement signal transmitted by the terminal device. Decide if you need it. As a result, it is not necessary for the network device to make the measurement configuration for the terminal device and for the terminal device to report the measurement result. Therefore, signaling overhead and transmission resources can be saved, and the utilization rate of transmission resources can be improved.

In an embodiment of the invention, selectively, as shown in FIG. 5, the method 300 further comprises the following steps:

S330: This terminal device transmits measurement signal-related information to the network device, and the measurement signal-related information is for instructing information on parameters corresponding to the measurement signal.

In the embodiment of the present invention, selectively, the measurement signal related information includes the transmission power information, and the transmission power information is used because the network device determines the transmission power of the measurement signal based on the transmission power information. Used for.

In the embodiments of the present invention, optionally, this transmit power information includes an absolute value of the transmit power of this measurement signal, or this transmit power information includes an offset of the transmit power of this measurement signal with respect to the initial transmit power. Here, the initial transmission power is the power for transmitting the measurement signal configured by the network device for the terminal device, or the transmission power information includes the transmission power margin of the terminal device.

In the embodiment of the present invention, the step of selectively transmitting the measurement signal related information to the network device by the terminal device includes a step of transmitting the uplink information via the uplink control channel. The information includes this transmission power information.

In the embodiment of the present invention, selectively, the reserved information bit in the uplink information includes this transmission power information, or this transmission power information is an index value of transmission power.

In the embodiment of the present invention, selectively, the step of the terminal device transmitting the measurement signal related information to the network device is the step of the terminal device transmitting the control element MAC CE of the media access control to the network device. Including, this MAC CE contains this transmission power information.

In the embodiments of the present invention, selectively, this method uses the initial transmission power, the index value of the transmission power, the measurement signal or the mode of the measurement signal and the level of the transmission power transmitted by the terminal device to the network device. The step of receiving at least one of the correspondence relationship and the correspondence relationship between the transmission power information and the reservation information bit in the uplink information is further included.

In an embodiment of the invention, optionally, the method further comprises the step of the terminal device receiving control information transmitted by the network device, the control information being measured by the terminal device to the network device. It is for instructing whether to transmit the signal and / or the measurement signal related information.
Here, the step in which this terminal device transmits this measurement signal to this network device is that if this control information indicates that this terminal device transmits this measurement signal to this network device, this terminal device will transmit this measurement signal to this network device. Includes the step of transmitting this measurement signal to the device.

Therefore, in the method for handover according to the embodiment of the present invention, the terminal device transmits a measurement signal to the network device, and the network device performs the handover based on the measurement signal transmitted by the terminal device. Decide if you need it. As a result, it is not necessary for the network device to make the measurement configuration for the terminal device and for the terminal device to report the measurement result. Therefore, signaling overhead and transmission resources can be saved, and the utilization rate of transmission resources can be improved.

As described above, in relation to FIGS. 4 and 5, the method for handover according to another embodiment of the present invention has been described in detail. Hereinafter, the network device according to the embodiment of the present invention will be described in detail in relation to FIG.

FIG. 6 shows a network device according to an embodiment of the present invention. As shown in FIG. 6, the network device 10 includes a transmission / reception module 11 and a determination module 12.

The transmission / reception module 11 is used to receive the measurement signal transmitted by the terminal device.

The determination module 12 is used to determine whether or not the terminal device needs to perform a handover based on this measurement signal.

Therefore, the network device according to the embodiment of the present invention determines whether or not the terminal device needs to perform a handover based on the measurement signal transmitted by the terminal device. As a result, it is not necessary for the network device to make the measurement configuration for the terminal device and for the terminal device to report the measurement result. Therefore, signaling overhead and transmission resources can be saved, and the utilization rate of transmission resources can be improved.

In an embodiment of the invention, selectively, the determination module 12 is also used to obtain measurement signal related information, which indicates information about the parameters corresponding to the measurement signal. For
Here, in order to determine whether or not the terminal device needs to perform a handover based on this measurement signal, the determination module 12 specifically, based on this measurement signal and the measurement signal related information, determines. It is used to determine if this terminal device needs to perform a handover.

In the embodiments of the present invention, optionally, the transmit / receive module 11 is also used to receive the measurement signal related information transmitted by the terminal device.

In the embodiment of the present invention, selectively, this measurement signal related information includes transmission power information, and this transmission power information is because the network device determines the transmission power of this measurement signal based on this transmission power information. Used for
Here, the determination module 12 is specifically used to acquire this transmission power information.

In the embodiments of the present invention, optionally, this transmit power information includes an absolute value of the transmit power of this measurement signal, or this transmit power information includes an offset of the transmit power of this measurement signal with respect to the initial transmit power. Here, the initial transmission power is the power for transmitting the measurement signal configured by the network device for the terminal device, or the transmission power information includes the transmission power margin of the terminal device.

In the embodiment of the present invention, selectively, the transmission / reception module 11 is specifically used to receive the uplink information transmitted by the terminal device via the uplink control channel, and this transmission is used for the uplink information. Contains power information.

In the embodiment of the present invention, selectively, the reserved information bit in the uplink information includes this transmission power information, or this transmission power information is an index value of transmission power.

In the embodiment of the present invention, selectively, the transmission / reception module 11 is specifically used to receive the control element MAC CE of the media access control transmitted by the terminal device, and this transmission to the MAC CE. Contains power information.

In the embodiment of the present invention, selectively, the determination module 12 is used to determine the transmission power information specifically based on the measurement signal or the correspondence between the mode of the measurement signal and the transmission power. Ru.

In an embodiment of the present invention, the determination module 12 selectively determines the transmission power information based on the measurement signal or the correspondence between the mode of the measurement signal and the transmission power level. Used for.

In an embodiment of the present invention, optionally, the determination module 12, specifically, to determine the transmission port of the measurement signal, based on a corresponding relationship between the transmission power and the transmission port, determines the transmission power information to, or, this determines the time-frequency resources corresponding to the measurement signal, based on a corresponding relationship between the time and frequency resource transmission power, determines the transmission power information, or a code word corresponding to the measurement signal determined, based on a corresponding relationship between the codeword and the transmission power, it is used to determine the transmission power information.

In the embodiment of the present invention, selectively, the determination module 12 determines the signal quality of the uplink signal based on the measurement signal and the measurement signal related information, and based on the signal quality, the terminal. It is used to determine whether the device needs to perform a handover or, based on its signal quality and downlink channel performance, whether or not this terminal device needs to perform a handover.

In the embodiment of the present invention, selectively, before the transmission / reception module 11 receives the measurement signal transmitted by the terminal device, the transmission / reception module 11 also indexes the initial transmission power and the transmission power to the terminal device. Used to transmit at least one of the correspondence between the value, the measurement signal or the mode of the measurement signal and the transmission power or the level of the transmission power, and the correspondence between the transmission power information and the reserved information bit in the uplink information. Will be done.

In an embodiment of the invention, selectively, the transmit / receive module 11 is also used to transmit control information to the terminal device, which control information is used by the terminal device to measure signals and / or to the network device. Alternatively, it is for instructing whether or not to transmit the measurement signal related information.

Regarding the network device according to the embodiment of the present invention, the flow corresponding to the method 200 for handover according to the embodiment of the present invention can be referred to, and each unit / module in this network device and the other operations described above and the above-mentioned other operations and Each of / or functions is used to realize the corresponding flow in Method 200, and detailed description is omitted here for the sake of brevity.

Therefore, the network device according to the embodiment of the present invention determines whether or not the terminal device needs to perform a handover based on the measurement signal transmitted by the terminal device. As a result, it is not necessary for the network device to make the measurement configuration for the terminal device and for the terminal device to report the measurement result. Therefore, signaling overhead and transmission resources can be saved, and the utilization rate of transmission resources can be improved.

FIG. 7 shows a terminal device according to an embodiment of the present invention. As shown in FIG. 7, the terminal device 20 includes a generation module 21 and a transmission / reception module 22.

The generation module 21 is used to generate a measurement signal.

The transmission / reception module 22 is used to transmit this measurement signal to the network device.

Therefore, in the terminal device according to the embodiment of the present invention, by transmitting the measurement signal to the network device, whether or not the network device needs to perform the handover by the terminal device based on the measurement signal transmitted by the terminal device. To determine. As a result, it is not necessary for the network device to make the measurement configuration for the terminal device and for the terminal device to report the measurement result. Therefore, signaling overhead and transmission resources can be saved, and the utilization rate of transmission resources can be improved.

In the embodiment of the present invention, selectively, the transmission / reception module 22 is specifically used to transmit the measurement signal-related information to the network device, and the measurement signal-related information corresponds to the measurement signal. It is for indicating parameter information.

In the embodiment of the present invention, selectively, the measurement signal related information includes the transmission power information, and the transmission power information is used because the network device determines the transmission power of the measurement signal based on the transmission power information. Used for.

In the embodiments of the present invention, optionally, this transmit power information includes an absolute value of the transmit power of this measurement signal, or this transmit power information includes an offset of the transmit power of this measurement signal with respect to the initial transmit power. Here, the initial transmission power is the power for transmitting the measurement signal configured by the network device for the terminal device, or the transmission power information includes the transmission power margin of the terminal device.

In the embodiments of the present invention, selectively, the transmission / reception module 21 is also used to transmit uplink information via the uplink control channel, and the uplink information includes this transmission power information.

In the embodiment of the present invention, selectively, the reserved information bit in the uplink information includes this transmission power information, or this transmission power information is an index value of transmission power.

In the embodiment of the present invention, selectively, the transmission / reception module 21 is specifically used to transmit the control element MAC CE of the media access control to the network device, and the transmission power information is transmitted to the MAC CE. It is included.

In the embodiments of the present invention, selectively, the transmit / receive module 21 also selectively transmits the initial transmission power, the index value of the transmission power, the measurement signal or the mode of the measurement signal, and the transmission power or the level of the transmission power transmitted by the network device. It is used to receive at least one of the correspondence between the transmission power information and the reservation information bit in the uplink information.

In the embodiment of the present invention, selectively, the transmission / reception module 21 is also used to receive the control information transmitted by the network device, and the control information is used as a measurement signal by the terminal device to the network device. And / or to indicate whether or not to transmit measurement signal related information.
Here, in order to transmit the measurement signal to the network device, the transmission / reception module 21 specifically indicates that this control information indicates that the terminal device transmits the measurement signal to the network device. It is used to transmit this measurement signal to this network device.

Regarding the terminal device according to the embodiment of the present invention, the flow corresponding to the method 300 for handover according to the embodiment of the present invention can be referred to, and each unit / module in this terminal device and the other operations described above and the above-mentioned other operations and Each of / or functions is used to realize the corresponding flow in Method 300, and for the sake of brevity, detailed description is omitted here.

Therefore, in the terminal device according to the embodiment of the present invention, by transmitting the measurement signal to the network device, whether or not the network device needs to perform the handover by the terminal device based on the measurement signal transmitted by the terminal device. To determine. As a result, it is not necessary for the network device to make the measurement configuration for the terminal device and for the terminal device to report the measurement result. Therefore, signaling overhead and transmission resources can be saved, and the utilization rate of transmission resources can be improved.

FIG. 8 shows a network device according to another embodiment of the present invention. As shown in FIG. 8, the network device 100 includes a processor 110 and a transmitter / receiver 120, the processor 110 and the transmitter / receiver 120 are connected to each other, and optionally, the network device 100 further includes a memory 130, the memory 130. Are connected to each other with the processor 110, and more optionally, the network device 100 comprises a bus system 140. Here, the processor 110, the memory 130 and the transmitter / receiver 120 can be connected to each other via the bus system 140, which memory 130 can be used to store instructions, which processor 110 is this. It is used to control the transmitter / receiver 120 to send or receive information by executing instructions stored in memory 130. Here, the transmitter / receiver 120 is used to receive the measurement signal transmitted by the terminal device, and the processor 110 determines whether or not the terminal device needs to perform a handover based on the measurement signal. Used for.

Therefore, the network device according to the embodiment of the present invention determines whether or not the terminal device needs to perform a handover based on the measurement signal transmitted by the terminal device. As a result, it is not necessary for the network device to make the measurement configuration for the terminal device and for the terminal device to report the measurement result. Therefore, signaling overhead and transmission resources can be saved, and the utilization rate of transmission resources can be improved.

In an embodiment of the invention, the processor 110 may be a central processing unit (referred to simply as a "CPU"), which may also be another general purpose processor, a digital signal processor (DSP), It should be understood that it may be an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, an individual gate or transistor logic device, an individual hardware component, and the like. The general purpose processor may be a microprocessor, or this processor may also be any ordinary processor or the like.

The memory 130 may include a read-only memory and a random access memory to provide instructions and data to the processor 110. A portion of the memory 130 may also include a non-volatile random access memory. For example, the memory 130 may also store device type information.

In addition to the data bus, the bus system 130 may include a power supply bus, a control bus, a status signal bus, and the like. However, for clarity, various buses will be referred to as bus system 130 in the drawings.

At the time of implementation, each step of the above method can be completed by a hardware integrated logic circuit in the processor 11 or an instruction in the form of software. In connection with the steps of the method disclosed in the examples of the present invention, it is embodied to be executed and completed directly by a hardware processor or executed and completed by a combination of hardware and software modules in the processor. Can be done. The software module may be located in a recording medium well known in the art such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers. The recording medium is located in memory 130, and the processor 110 reads the information in memory 130 and combines it with its hardware to complete the steps of the above method. A detailed description is omitted here to avoid duplication.

Optionally, as an embodiment, the processor 110 is also used to obtain measurement signal related information, which measurement signal related information is for directing information on parameters corresponding to the measurement signal. And
Here, in order to determine whether or not the terminal device needs to perform a handover based on this measurement signal, the processor 110 specifically, based on this measurement signal and this measurement signal related information, this processor 110 It is used to determine if the terminal device needs to perform a handover.

Optionally, as an embodiment, the transmitter / receiver 120 is also used to receive the measurement signal related information transmitted by the terminal device.

Optionally, as an embodiment, this measurement signal related information includes transmit power information, which is used by this network device to determine the transmit power of this measurement signal based on this transmit power information. Being done
Here, the processor 110 is specifically used to acquire this transmission power information.

Optionally, as an embodiment, this transmit power information includes the absolute value of the transmit power of this measurement signal, or this transmit power information includes an offset of the transmit power of this measurement signal with respect to the initial transmit power, where. , This initial transmission power is the power for transmitting the measurement signal configured by this network device for this terminal device, or this transmission power information includes the transmission power margin of this terminal device.

Optionally, as an embodiment, the transmitter / receiver 120 is specifically used to receive uplink information transmitted by the terminal device via the uplink control channel, which includes this transmit power information. It is included.

Optionally, as an embodiment, the reserved information bit in the uplink information includes this transmit power information, or the transmit power information is an index value of the transmit power.

Optionally, as an embodiment, the transmitter / receiver 120 is specifically used to receive a control element MAC CE for media access control transmitted by the terminal device, which is provided with this transmit power information. It is included.

Optionally, as an embodiment, the processor 110 is specifically used to determine this transmit power information based on the measurement signal or the correspondence between the mode of the measurement signal and the transmit power.

Optionally, as an embodiment, the processor 110 is specifically used to determine this transmit power information based on the correspondence between this measurement signal or the mode of this measurement signal and the level of transmit power. To.

Optionally, as an example, the processor 110 is specifically determines the transmission port of the measurement signal, based on a corresponding relationship between the transmission power and the transmission port, to determine the transmission power information, or determines the time-frequency resources corresponding to the measurement signal, based on a corresponding relationship between the time-frequency resource and transmit power, to determine the transmission power information, or to determine the codeword corresponding to the measurement signal, based on the correspondence between the code word and the transmit power, it is used to determine the transmission power information.

Optionally, as an embodiment, the processor 110 specifically determines the signal quality of the uplink signal based on the measurement signal and the measurement signal related information, and based on this signal quality, the terminal device is handed over. It is used to determine whether or not this terminal device needs to perform handover, or based on the signal quality and the performance of the downlink channel.

Optionally, as an example, before the transmitter / receiver 120 receives the measurement signal transmitted by the terminal device, the transmitter / receiver 120 may also send the terminal device an initial transmit power, an index value of transmit power, and the like. It is used to transmit at least one of the correspondence between the measurement signal or the mode of the measurement signal and the transmission power or the level of the transmission power, and the correspondence between the transmission power information and the reservation information bit in the uplink information. ..

Optionally, as an embodiment, the transmitter / receiver 120 is also used to transmit control information to the terminal device, which control information is used by the terminal device to measure signals and / or measure to the network device. This is for instructing whether or not to transmit signal-related information.

Regarding the network device according to the embodiment of the present invention, the flow corresponding to the method 200 for handover according to the embodiment of the present invention can be referred to, and each unit / module in this network device and the other operations described above and the above-mentioned other operations and Each of / or functions is used to realize the corresponding flow in Method 200, and detailed description is omitted here for the sake of brevity.

Therefore, the network device according to the embodiment of the present invention determines whether or not the terminal device needs to perform a handover based on the measurement signal transmitted by the terminal device. As a result, it is not necessary for the network device to make the measurement configuration for the terminal device and for the terminal device to report the measurement result. Therefore, signaling overhead and transmission resources can be saved, and the utilization rate of transmission resources can be improved.

FIG. 9 shows a schematic block diagram of a terminal device according to another embodiment of the present invention. As shown in FIG. 9, the terminal device 200 includes a processor 210 and a transmitter / receiver 220, and the processor 210 and the transmitter / receiver. The 220s are connected to each other and optionally the terminal device 200 further comprises a memory 230, the memory 230 is connected to and from the processor 210, and optionally the terminal device 200 comprises a bus system 240. Here, the processor 210, the memory 230 and the transmitter / receiver 220 can be connected to each other via the bus system 240, the memory 230 can be used to store instructions, and the processor 210 , Used to control the transmitter / receiver 220 to transmit or receive information by executing the instructions stored in the memory 230. Here, the processor 210 is used to generate a measurement signal, and the transmitter / receiver 220 is used to transmit the measurement signal to the network device.

Therefore, in the terminal device according to the embodiment of the present invention, by transmitting the measurement signal to the network device, whether or not the network device needs to perform the handover by the terminal device based on the measurement signal transmitted by the terminal device. To determine. As a result, it is not necessary for the network device to make the measurement configuration for the terminal device and for the terminal device to report the measurement result. Therefore, signaling overhead and transmission resources can be saved, and the utilization rate of transmission resources can be improved.

In an embodiment of the invention, the processor 210 may be a Central Processing Unit (simply referred to as a "CPU"), which may also be another general purpose processor, a digital signal processor (DSP), It should be understood that it may be an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, an individual gate or transistor logic device, an individual hardware component, and the like. The general purpose processor may be a microprocessor, or this processor may also be any ordinary processor or the like.

The memory 230 may include read-only memory and random access memory to provide instructions and data to the processor 210. A portion of the memory 230 may also include a non-volatile random access memory. For example, the memory 230 may also store device type information.

The bus system 240 may include a power supply bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity, various buses will be referred to as bus system 240 in the drawings.

At the time of implementation, each step of the above method can be completed by a hardware integrated logic circuit in processor 210 or an instruction in the form of software. In connection with the steps of the method disclosed in the examples of the present invention, it is embodied to be executed and completed directly by a hardware processor or executed and completed by a combination of hardware and software modules in the processor. Can be done. The software module may be located in a recording medium well known in the art such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers. The recording medium is located in memory 230, and the processor 210 reads the information in memory 230 and combines it with its hardware to complete the steps of the above method. A detailed description is omitted here to avoid duplication.

Optionally, as an embodiment, the transmitter / receiver 220 is specifically used to transmit measurement signal related information to the network device, the measurement signal related information being a parameter corresponding to the measurement signal. It is for instructing information.

Optionally, as an embodiment, this measurement signal related information includes transmit power information, which is used by this network device to determine the transmit power of this measurement signal based on this transmit power information. Will be done.

Optionally, as an embodiment, this transmit power information includes the absolute value of the transmit power of this measurement signal, or this transmit power information includes an offset of the transmit power of this measurement signal with respect to the initial transmit power, where. , This initial transmission power is the power for transmitting the measurement signal configured by this network device for this terminal device, or this transmission power information includes the transmission power margin of this terminal device.

Optionally, as an embodiment, the transmitter / receiver 220 is also used to transmit uplink information over the uplink control channel, which includes this transmit power information.

Optionally, as an embodiment, the reserved information bit in the uplink information includes this transmit power information, or the transmit power information is an index value of the transmit power.

Optionally, as an embodiment, the transmitter / receiver 220 is specifically used to transmit a control element MAC CE for media access control to the network equipment, which MAC CE includes this transmit power information. It has been.

Optionally, as an embodiment, the transmitter / receiver 220 also includes an initial transmission power transmitted by the network device, an index value of the transmission power, a measurement signal or a correspondence between the mode of the measurement signal and the transmission power level. And used to receive at least one of the correspondences between the transmitted power information and the reserved information bits in the uplink information.

Optionally, as an embodiment, the transmitter / receiver 220 is also used to receive control information transmitted by the network device, which control information is used by the terminal device to measure signals and / or to the network device. Or, it is for instructing whether or not to transmit the measurement signal related information.
Here, in order to transmit the measurement signal to the network device, the transmitter / receiver 220 specifically indicates that the terminal device transmits the measurement signal to the network device. It is used to transmit this measurement signal to this network device.

Regarding the terminal device according to the embodiment of the present invention, the flow corresponding to the method 300 for handover according to the embodiment of the present invention can be referred to, and each unit / module in this terminal device and the other operations described above and the above-mentioned other operations and Each of / or functions is used to realize the corresponding flow in Method 300, and for the sake of brevity, detailed description is omitted here.

Therefore, in the terminal device according to the embodiment of the present invention, by transmitting the measurement signal to the network device, whether or not the network device needs to perform the handover by the terminal device based on the measurement signal transmitted by the terminal device. To determine. As a result, it is not necessary for the network device to make the measurement configuration for the terminal device and for the terminal device to report the measurement result. Therefore, signaling overhead and transmission resources can be saved, and the utilization rate of transmission resources can be improved.

As used throughout the specification, "one example" or "one example" means that a particular feature, structure or property associated with an embodiment is included in at least one embodiment of the invention. Should be understood. Therefore, "in one embodiment" or "in one embodiment" described elsewhere throughout this specification does not necessarily refer to the same embodiment. Also, these particular features, structures or properties can be combined in any suitable manner in one or more embodiments.

The terms "and / or" herein are merely associations that describe related objects, indicating that three relationships can exist, eg, A and / or B, where A exists alone, A and / or B. It should be understood that it represents three cases where B is present at the same time and B is present alone. Further, the reference numeral "/" in the present specification generally indicates that there is a "or" relationship between the objects related to each other.

In each embodiment of the present invention, the magnitude of the numbers of each of the above flows does not mean the order of execution before and after, and the order of execution of each flow should be determined by its function and internal logic. It should be understood that it does not constitute any limitation on the embodiment of the present invention.

For those skilled in the art, the steps and units of each method described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both, hardware and software. It is recognized that in the above description, the features generally describe the steps and configurations of each embodiment in order to clearly illustrate compatibility. Whether these functions are performed in hardware or software depends on the specific application of the technical means and design constraints. One of ordinary skill in the art can realize the functions described using different methods for each particular application, but such realization should not be considered beyond the scope of the present invention.

The methods or steps described in connection with the embodiments disclosed herein can be performed with hardware, a software program executed by a processor, or a combination thereof. Software programs include random access memory (Random Access Memory, RAM), memory, read-only memory (Read-Only Memory, ROM), electrically programmable Read-only memory (Electrically Programmable Read-Only Memory, EEPROM), and electrically. Erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), registers, hard disks, removable disks, compact disk read-only memory (Compact Disc Read-Only Memory, in the field) It may be placed on any other form of recording medium.

It should be understood that in some of the embodiments provided in the present invention, the disclosed systems, devices and methods may be implemented in other ways. For example, the embodiment of the device as described above is merely an example, for example, the division of the unit is a division by a mere logical function, and when it is actually realized, another division method is used. There may be, for example, multiple units or components combined or integrated into another system, or some features may be omitted or not implemented.

The unit described as this separating member may or may not be physically separated, and the member represented as a unit may be a physical unit or physically. It does not have to be a unit, it may be located in the same place, or it may be distributed over a plurality of network units. Depending on the actual demand, some or all of the units can be selected to achieve the purpose of this embodiment.

Each functional unit according to each embodiment of the present invention may be integrated in one processing unit, or each unit may physically exist independently, or two or more units. May be integrated in one unit.

Although the present invention has been described in detail in relation to the preferred embodiments with reference to the drawings, the present invention is not limited thereto. One of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the invention without departing from the spirit and essence of the invention, all of which are modifications or substitutions of the present invention. Included within range.

Claims (12)

The step that the network device receives the measurement signal transmitted by the terminal device,
A step in which the network device determines whether or not the terminal device needs to perform a handover based on the measurement signal, and
The network device includes a step of acquiring measurement signal-related information, and the measurement signal-related information is for instructing information on parameters corresponding to the measurement signal.
Here, the step of determining whether or not the terminal device needs to perform a handover based on the measurement signal by the network device is
The network device includes a step of determining whether or not the terminal device needs to perform a handover based on the measurement signal and the measurement signal related information.
The measurement signal related information includes transmission power information, and the transmission power information is used by the network device to determine the transmission power of the measurement signal based on the transmission power information.
Here, the step of the network device to acquire the measurement signal related information is
The network device includes a step of acquiring the transmission power information.
The transmission power information includes an absolute value of the transmission power of the measurement signal, or
The transmission power information includes an offset of the transmission power of the measurement signal with respect to the initial transmission power, where the initial transmission power is the power for transmitting the measurement signal configured by the network device for the terminal device. Yes or
A method for handover, wherein the transmission power information includes a transmission power margin of the terminal device. The step in which the network device acquires the transmission power information is
The network device includes a step of receiving uplink information transmitted by the terminal device via the uplink control channel PUCCH, and the uplink information includes the transmission power information.
The reserved information bit in the uplink information is used to indicate the transmit power information, or the index is used to indicate the transmit power information.
The step in which the network device acquires the transmission power information is
The network device, according to claim 1, wherein comprising the step of the terminal device receives the control element MAC CE for media access control transmitter, is the MAC CE, characterized in that it contains the said transmission power information the method of. The step in which the network device acquires the transmission power information is
The network device includes a step of determining the transmission power information based on the measurement signal or the correspondence between the mode of the measurement signal and the transmission power.
The step in which the network device determines the transmission power information based on the measurement signal or the correspondence between the mode of the measurement signal and the transmission power is
The method according to claim 1 , wherein the network device includes a step of determining the transmission power information based on the correspondence between the measurement signal or the mode of the measurement signal and the transmission power level. The step in which the network device determines the transmission power information based on the measurement signal or the correspondence between the mode of the measurement signal and the transmission power level is
A step in which the network device determines the antenna port of the measurement signal, and the network device determines the transmission power information based on the correspondence between the antenna port and the transmission power, or
A step in which the network device determines the time frequency resource corresponding to the measurement signal, and the network device determines the transmission power information based on the correspondence between the time frequency resource and the transmission power, or
3. The third aspect of the present invention includes a step in which the network device determines a code word corresponding to the measurement signal, and the network device determines the transmission power information based on the correspondence between the code word and the transmission power. The method described in. Before the network device receives the measurement signal transmitted by the terminal device,
The network device informs the terminal device of the initial transmission power, the index value of the transmission power, the correspondence between the measurement signal or the mode of the measurement signal and the transmission power or the transmission power level, and the reservation information bit in the transmission power information and the uplink information. The method according to any one of claims 1 to 4 , further comprising a step of transmitting at least one piece of information in the correspondence. Further including a step of the network device transmitting control information to the terminal device, the control information indicates whether or not the terminal device transmits a measurement signal and / or measurement signal related information to the network device. The method according to any one of claims 1 to 5 , wherein the method is characterized by the above. A transmitter / receiver module used to receive the measurement signal transmitted by the terminal device,
A determination module used to determine whether or not the terminal device needs to perform a handover based on the measurement signal is provided .
The decision module also
It is used to acquire the measurement signal related information, and the measurement signal related information is for instructing the information of the parameter corresponding to the measurement signal.
The determination module
It is used to determine whether or not the terminal device needs to perform a handover based on the measurement signal and the measurement signal related information.
The measurement signal related information includes transmission power information, and the transmission power information is used by the network device to determine the transmission power of the measurement signal based on the transmission power information.
Here, the determination module is used to acquire the transmit power information,
The transmission power information includes an absolute value of the transmission power of the measurement signal, or
The transmission power information includes an offset of the transmission power of the measurement signal with respect to the initial transmission power, where the initial transmission power is the power for transmitting the measurement signal configured by the network device for the terminal device. Yes or
The network device, characterized in that the transmission power information includes a transmission power margin of the terminal device. The transmission / reception module
The terminal device is used to receive uplink information transmitted via the uplink control channel PUCCH, and the uplink information includes the transmitted power information.
The reserved information bit in the uplink information is used to indicate the transmit power information, or the index is used to indicate the transmit power information.
The transmission / reception module
The network device according to claim 7 , wherein the network device is used for receiving the control element MAC CE of the media access control transmitted by the terminal device, and the MAC CE includes the transmission power information. The determination module
It is used to determine the transmission power information based on the measurement signal or the correspondence between the mode of the measurement signal and the transmission power.
The determination module
The network device according to claim 7 , wherein the network device is used to determine the transmission power information based on the measurement signal or the correspondence between the mode of the measurement signal and the transmission power level. The determination module
The antenna port of the measurement signal is determined, and the transmission power information is determined or the transmission power information is determined based on the correspondence between the antenna port and the transmission power.
The time frequency resource corresponding to the measurement signal is determined, and the transmission power information is determined or the transmission power information is determined based on the correspondence relationship between the time frequency resource and the transmission power.
The network device according to claim 9 , wherein a code word corresponding to the measurement signal is determined, and the code word is used to determine the transmission power information based on the correspondence between the code word and the transmission power. Before the transmit / receive module receives the measurement signal transmitted by the terminal device, the transmit / receive module also receives the measurement signal.
The correspondence between the initial transmission power, the index value of the transmission power, the measurement signal or the mode of the measurement signal and the transmission power or the transmission power level, and the correspondence between the transmission power information and the reservation information bit in the uplink information to the terminal device. The network device according to any one of claims 7 to 10 , characterized in that it is used to transmit at least one of the information. The transmit / receive module also
It is used to transmit control information to the terminal device, and the control information is for instructing whether or not the terminal device transmits a measurement signal and / or measurement signal related information to the network device. The network device according to any one of claims 7 to 11.

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